Printing-press.



E. P. JENNINGS, In.

PRINTING PRESS.

APPLICATION FILED JAN-26, 1914.

Patented Feb.'29, 1916.

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EMERSON JIINNINGS, JR., OFLEHIGHTON', PENNSYLVANIA.

PRINT NG-Passe.

To all whom it may concern: 1

"Be' it known that I, EMnRsoN P; JEN- NINGS, Jr., a citizen of theUnited "States, residing at Lehighton, in the county of Carbon andState'iof" Pennsylvania, have invented certain new and usefulImprovements' in Printing-Presses, of which the following isv aspecification, reference-being had therein to the accompanying drawing.

' This invention relates to printing presses and more particularly to anadjusting de-- vice for a press in which one member of the printingcouple has reciprocatory movement.

The object of the inventionis to provide means for adjusting themovement of the movable member of the couple, to regulate theimpression, by adjusting the throw of the actuating device for saidmovable member. v 1

In the accompanying drawlngs, Flgure 1 is a side elevation of a printingpress emvbodying the invention; and Fig. 2 is a detail view of theadjusting device.

As shown in these drawings the invention is applied to a Cartwrightpress, as shown and described in Patent No. 926,851, of July 26th, 1909.It is unnecessary'to describe this press in detail but it is suflicientto say that it comprises a main frame 1 having mounted therein anormally stationary f platen 2 and is provided with a combined form-bed3 and inking drum 4: which are carried by slide blocks 5 mounted 1ngu1de ways 6 formed in the side members of the 7 main frame 1. The inkdistributing rollers,

which are shown at 7., are mounted on brackets 8 which, in turn, arejournaled on the axis of the combined form-bed and ink drum and movewithsaid form-bed and ink drum. Independent rotatory -moveme'nt 1s impartedto the brackets 8 to carry the distributing rollers about the drum andover the form-bed by means of a sprocket wheel 9 which is connected by asprocket chain 10 with a second sprocket wheel 11 on a main driveshaft12, this last-mentioned sprocket wheel being mounted eccentrlcallyon the shaft to maintain a proper tension on the chain during thereciprocatory movement of the form-bed and inking drum. Reciprocatorymovement is imparted to the formbed and inking drum by means of p1tmen13 secured to the respective slide blocks and connected with the drivingshaft 12, ,thls

' connection being preferably made through wrist pins 15.

Specification of Letters Patent. Patented Feb, 29, 1916, Applicationfiled January 26,1914 Serial No. 814,299.

which is ijournaledwin a bearing block 16 carried by the respectivepitmen 13. In order to adjust the lthrowof theform-bed and thus regulatethe impression I adjust the position of the pitmen relatively to theThis adjustment also has another function, that of regulating thetension on the driving chains for the distributing rollers. V I

The adjustment of the pitmen relatively to their wrist pins may besecured in any suitable manner. In the present instance I have adopted avery simple method which consists in mounting the bearing block 16 ofeach pitman in a guideway 17 of alength considerably greater than thelength of the bearing block and filling the spaces between the ends ofthe bearing block and the respective ends of the guideway with aplurality of plates or fillers 18. A'set screw 19 is mounted in thepitmen and bears against the plates at one end to clamp the wholestructure firmly in position. By loosening the set screw 19 and.shifting one or more of the fillers 18 from one side of the bearingblock to the other the position of this hearing block and consequentlythe position of the wrist pin relatively to the pitman is altered andthe throw of the pitman and the form-bed connected therewith is'adjusted. I find that this method of adjusting the impression is a verysimple and decidedly effective one. The plates are made of material ofsuch thinness that very fine adjustments can be made and these can. bemade without taking down any of the machinery or altering any otheradjustments.

While I have shown and described one embodiment of the'invention it willbe understood that'this has been chosen for the purpose of illustrationonly and that I do not desire to be limited to the details ofconstruction shown and described, for obvious modifications Wlll occurto a person skilled in the art.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is Y In a printing'p'ress, the combination,with a shaft, means for rotating said shaft, a sprocket wheeleccentricallv mounted on said shaft, a form-bed movable toward and awayfrom said shaft, a roller carriage mounted for rotation about saidform-bed,

a sprocketwheel connected with said roller carriage, a sprocket chainconnecting the V sprocket wheel onsaid roller carriage with the sprocketwheel on said shaft, and a crank wheel mounted on said shaft andha-vinga Wrist pin, of a pitman connecting said crank wheel with saidform-bed and provided at that end adjacent to said crank.

wheel with an elongated guideway, a hearplates interposed between theends ofjsaid bearing block and, the respective ends of said guideway,whereby the shifting of one or more of said plates from one end'of said1 5- plates and said bearing blockin theirad' 20- justed positions. r--In,testimony whereof, I afiix my signa-, ture in presence of twowitnesses. p

' EMERSON P. JENNINGS, JR".

Witnesses: I P. .M. GRAUL i FLORENCE-N; SHAKER.

Copies of this patent may be qttainf -f lnfi ve cents each,rb yaddressing, t fl sof Paints,

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